Absorption process by ion acoustic turbulence

We present a quantum transport theory for an interacting electron-ion-acoustic mode system in the presence of a strong laser field. On the basis of the center of mass approach, the quantum-kinetic equation in its operator form directly reflect the non linear transport effects due to the laser field. When this equation is put into its macroscopic form, we obtain the absorption rate which depends on the energy loss function Im[-1/ε(q,ω)]. We illustrate our theory, showing the proper way to calculate the collective part of the inverse bremsstrahlung process due to ion acoustic turbulence. (author) 10 refs